Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu manh » chieu xanh, hieu nganh, dieu hanh
trung cua » truong cua, trung tuan, trung cap
cua thong » cua thuong, cua khong, cua tong
cuong tap » luong tap, luong tai, cong tan
hoc hieu » hoc thieu, hoc hien, doc hieu
cong tac » cong ty
toan cao » toan ban
toan tap » toan ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu manh - thanh trung cua thong ((cong tac) or (cuong tap)) ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - thanh trung cua thong ((cong tac) OR (cuong tap)) ((toan cao) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - thanh trung cua thong ((cong tac) or (cuong tap)) ((toan cao) or (toan tap))*.